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Thread: Need help with chemicals before closing

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    Need help with chemicals before closing

    I am preparing pool for closing and I shocked the pool but my TA and PH are high and can't get to low. Need help with it.

    FC 18 (It was 23 after shock and reduced by 5ppm in 24hrs, I used BBB method.)
    CC 0
    TA 115
    PH 8.2
    CH 110

    I added Dry Acid 3lbs by mixing it in water to the pool. Ph came down to 7.8 after 1hour, but went back to 8.2 by end of the day.

    What should I do?

    1. Should I be reducing the Ph to 7.2 - 7.4 and TA to 80 -90 before closing?
    2. Or does it matter if Ph his high before closing?
    3. Will it affect my new Vinyl?

    Please advise.
    33,000 gallon (20x40), Sand, IG, Vinyl

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    In the Industry
    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: Need help with chemicals before closing

    Lower the pH. You do not want it that high ever and certainly not over the winter. I prefer muriatic acid but whichever you use, continue to add it until your pH stays around 7.2 - 7.4 and then close.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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